Richard,
If you have a particular market sector, you intend targeting your choice of equipment is easier, but............
What tends to happen in this business, is that, our aims can be blown away, by accident, by experience, by economics.
I always suggest ,that newcomers to this business, aquire second hand equipment, as there is a strong possibility that it may not be for you.
It's damned hard work...........more often than not, you work alone...........you may - in the early days - have to work unsociable hours and many of them.
Therefore IMO you should not invest any more than you can afford to lose.
Not being negative.........so many will tell you .............buy a t/m .......buy a big powerfull device ............don't buy a smaller machine............
There are always machines of all sizes appearing on the equipment for sale section.
best of luck
rob m